Re: Need some advice on Pacemaker Headers
The idea behind tuned length headers is that each of the primary tubes is of equal or Ďtunedí length, making the distance the exhaust gasses has to travel down each of them exactly or as close to the same as possible. This also allows for more equal scavenging across all 6 of your cylinders. For the extra $50 it is well worth getting a set off tuned length pacemaker headers as the power difference between a standard header and a tuned length one is phenomenal, equating to several kwís. Torque is another great issue there in that a tuned length system produces more torque across the rev range. All in all with a set of Pacemaker tuned length youíre looking at better exhaust scavenging which means more power and better fuel economy.
Another thing to note is the way Pacemaker use a pipe over cone design with all their headers. This helps to eliminate turbulence inside the collector cone and improved gas flow. Again, improved gas flow means more power.
I got a system nocked up with Pacemaker tuned length headers, high flow sports stainless cat and a 2 1/2 inch high flow sports exhaust system with high flow mufflers, did a new intake setup with a sequential bonnet scoop, K&N filter and thematic fans and that alone was producing 118.6rwkw 683.7 Nm of torque on the dyno. These things where only around the 90rwkw range stock so thatís a fair gain and most of it from the exhaust. Donít know what sheís pulling now cause I havenít had her tuned since I got the quench head fitted and sheís able to go up against commo V8 5Lís.